and tonight, sneak attack. hackers in the middle east targeting u.s. banks, freezing millions out of their accounts right now. is your money in danger? >>> head to head. as early voting begins, obama and romney adjust their closing arguments in the battleground of virginia. with up close and personal new ads before their big showdown next week. >>> inside job. tsa agents are supposed to screen your luggage. so, how did our stolen ipad end up in this officer's home? brian ross on hundreds of tsa officers caught red-handed. >>> and mona lisa mystery. you know the masterpiece. but could this be a second mona lisa? it was a claim that shocked the world today. so we put it to the test. >>> good evening. diane is on special assignment this thursday. we're going to tell you more about that in a bit. but we begin tonight with cyber warfare. the most extensive attack on american banks ever. launched from the middle east, happening right now. citigroup, bank of america, jpmorgan chase, wells fargo, u.s. bank corp and today, pnc. america's biggest banks, with mil